Why is it important to have a range of tools that can measure all parts of the electromagnetic spectrum

Because the electromagnetic spectrum comprises different types of electromagnetic radiation (radio waves, microwaves, infrared, optical, ultraviolet, X-rays, and gamma-rays), all of which have different wavelengths and require different tools to measure them.

Explanation:

For example, radio signals from space are captured by radio dishes, while visible and infrared light are captured by huge telescopes.